Refraction
When an RF signal meets the
boundary between media of two different densities, it can also be refracted.
Think of reflection as bouncing off a surface and refraction as being bent
while passing through a surface.
A refracted signal will have a
different angle from the original. The speed of the wave can also be affected
as it passes through the different materials. A signal can be refracted when it
passes through layers of air having different densities or through building
walls with different densities, for example.
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